Bulletin 118 California Groundwater Basins

Bulletin 118 defines the recognized groundwater basins and subbasins throughout the State of California. The Bulletin 118 document provides information on these basins/subbasins and the nature and extent of groundwater occurrence and management within the State. The Bulletin 118 dataset makes the geographic locations and extent of the 515 basins/subbasins publically available, for use in external mapping/GIS applications.